import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Pattern;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String result = Pattern.compile("\\d+")
            .matcher("123ABC458")
            .replaceAll(m -> new StringBuilder(m.group()).reverse().toString());

        System.out.println(result);
	}
}